For single-spaced pages with a standard font and normal margins, 1,000 words would be approximately equal to 2 1/4 pages. Most academic papers are double spaced, making 1,000 words equal to close to four pages in length. Some standard fonts include Arial, Times New Roman, Calibri and Verdana.
The proper margins and spacing depend on what style guide is to be followed. Both Modern Language Association, or MLA, and American Psychological Association, or APA, which are the two most common style guides for academic settings, use the Times New Roman font at the 12-point size, and the margins should be set to 1-inch all around. One reason an instructor may give an assignment length in words instead of pages is because page length can be faked by changing the margins and fonts.